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5V925BQGI8 Fiches technique(PDF) 2 Page - Integrated Device Technology |
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5V925BQGI8 Fiches technique(HTML) 2 Page - Integrated Device Technology |
2 / 18 page IDT5V925BQGI REVISION B JANUARY 21, 2011 2 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Table 1. Pin Descriptions NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values. NOTE 1: For best accuracy, use parallel resonant crystal specified for a load capacitance of 18pF. Table 2. Pin Characteristics Number Name Type Description 1, 2 S1, S0 Input Pullup/ Pulldown Three level divider/mode select pins. Float to MID. 3 GNDQ Power Ground supply for PLL. 4VDDQ Power Power supply for PLL. 5X1(1) Input Crystal oscillator input. Connected to GND if oscillator not required. 6X2(1) Output Crystal oscillator output. Leave unconnected for clock input. 7 CLKIN Input Clock input. 8 FB Input PLL feedback input which should be connected to Q/N output pin only. PLL locks onto positive edge of FB signal. 9OE Input High-Impedance output enable. When asserted HIGH, clock outputs are high impedance. 10, 15 GND Power Ground supply for output buffers. 11 Q/N Output Programmable divide-by-N clock output. 12, 13, 14 Q0, Q1, Q2 Output Output at N*CLKIN frequency. 16 VDD Power Power supply for output buffers. Symbol Parameter Test Conditions Minimum Typical Maximum Units CIN Input Capacitance CLKIN, FB, OE 4pF CPD Power Dissipation Capacitance (per output) VDD = 3.6V 15 pF RPULLUP Input Pullup Resistor 47 k Ω RPULLDOWN Input Pulldown Resistor 47 k Ω ROUT Output Impedance VDD = 3.3V±0.3V 16 Ω |
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